Question

A glass stopper of 20 cm^3 volume and weight as 50 g-wt, as observed by using a spring balance, is taken and immersed completely in tap water. What will be the amount of up thrust and apparent weight of glass stopper?

Answer 1

According to Archimedes principle

Upthrust force acting on body = Weight of water displaced by the body

As stopper volume = 20 cm^3 thus it can only displace 20 cm^3 of tap water

Also we know density of water = 1 g/cm^3

Therefore the weight of water displaced = 1×20 -20g

(Weight = Density × Volume )

Thus Upthrust = 20g or .2N (force = mass × gravitational acceleration)

NOTE: Here I taken gravitational acceleration = 1 O m/s^2

Now,weight of stopper will be reduced by the upthrust by 20g as it act against the body weight

Thus, Apparent Weight = 50 -20= 30g

ALL THE BEST FOR YOUR EXAM

Answer 2

Explanation:

The three most common methods are basin irrigation, border irrigation and furrow irrigation. Water is typically introduced at the highest point or along the edge of a field, which allows covering the field by overland flow.